Dumping car



J. A. HEBB DUMPING CAR July'v 3o, 1929.

Filed Nov. 4, 1926 Patented July 30, 1929.

A UNITED STATES JOHN n; Hannon HoPWoo-n, PENNSYLVANIA.

nUMPINe can.

Application led November 4, 1926'. Serial No. 146,172.

My invention consists of an improvement in dumping cars, of the kindused in coal mine operations and the like. y

It has for its object to provide an automatically opening end gate fordischarge of the contents by gravity, when the car is elevated andtipped in the usual lifting and lowering cage of a vertical shaft, fordischarging the contents downwardly therefrom into a receiving chute orthe like.

The invention is illustrated in the accompanying drawings, in which:

Fig. 1 is a somewhat diagrammatic View in side elevation, showing thecar and its lifting cage at a partially advanced dumping position;

Fig. 2 is a det-ail view of the opening loop for unlocking and liftingthe end gate;

Fig. 3 is a partial similar View, lshowing the car fully tipped with theend gate raised;

Fig. 4 is an end View of the car, showing the end gate in lockedposition;

Fig. 5 is a sectional view on the line V-V of Fig. 4;

Fig. 6 is a partial plan view, showing the construction at thedischarging end.

The car A is of usual construction for coal mine operation, having theclosely adjacent wheels 2 adapting it to be run along the mine tracksand onto the supporting platform and rails 3 of a well known automaticselfdumping cage 4. The latter is of a construction commonly utilized incoal mine shaft operations, adapted to receive the car A at any lowerposition in the mine and to elevate it, then by automatic operativemechanism of a well known type, to tip the cage forwardly for dumping,the wheels being fiXedly held by the usual clamps or dogs 5.

The particular feature of invention is in the mounting, locking andunlocking of the end gate 6. Such end gate fills the cross-sectionalarea of the car at one end between its sides 7, and is located slightlyback of the terminal delivery edge of floor 8. The end gate litssomewhat loosely between the sides for free opening and closing, andretention of the load, and is properly braced and reinforced by cornerbrackets and straps 9.

The upper one of these extends backwardly at each outer side of the carby extension 10, and is pivotally connected at 11 by a bolt or stud withthe upper side edge portions of the car A, as clearly shown.

The arms 9, 10, as thus constructed, strongly support the end gate, andpass outwardly at each side around vertical reinforcing brace members orbelts 12.

These. surround the car for reinforcement at its forward end and extendupwardly slightly above its edge by turned in terminals 13, over whichthe supporting arms 10- pass in lowering, for guiding and assisting inmaintaining them and the end gate in proper alinement for closing at theend of the car between its sides. y

The lower vertical and sloping sides of the car body also preferablyextend, like bottom 8, somewhat outwardly beyondV the normall positionof the end gate, for protection there" of and free discharge movement ofthe load.

The end gate 6 as thus mounted, is capable of being lifted by the meanshereinafter described, and to be lowered by gravity when the car isre-erected towards a horizontal position.

For such purpose I provide a specially designed locking bolt 14 which inthe form shown` is vertically straight at its upper portion, then offsetlaterally as at 15, and then extended downwardly as at 16, providing alocking extension which fits freely within an enlarged opening 17 in.the extended floorof the car.

Vertical stem 14 is mounted for guiding movement in a bearing 18 securedto the front face of the door, while oset kstem portion 16 is similarlymounted in a bearing 19. When lowered, the offset portion 15 bearsdownwardly against bearing 19, limiting further movement while the sameeffect is carried out on upward movement by contact against bearing 18.The locking bar is thus capable of a limited vertical movement andguiding action in either direction. v

For the purpose of lifting the locking bolt, it is provided at its upperend with an outwardly extending hook 2O which is maintained in suchoutward position by the offset guiding mounting of the bolt abovedescribed.

At a suitable location above the shaft and properly arranged forengagement of hook 20, is a loop 21 having an elongated cross bottom bar22 and suspended by a chain or chains 23 from any suitable portion ofthe superstructure. l preferably also utilize two outer chains as shown,which tend to hold the bar continuously straight, avoiding twistingmovement, so as to ensure proper engagement with hook 20.

As the car rises and tips forwardly for dumping, the hook engages bar 22of the loop, which upon further downward tipping of the car, arrests thelocking bolt, withdrawing it from socket 17 until oset 15 engagesbearing 18, after which the entire weight of the end gate is suspendedand its downward maintained in operative post-ion at all times,

with the limited vertical movement for locking and unlocking, either inthe exact form shown, or any equivalent construction for the sameeffect.

What I claim is:

l; In a dumping car of the class `described having a forward anddownward movement and provided at its front with a bolt socket, thecombination therewith of an outwardly and upwardly swinging end gatehaving a vertically arranged slidably mounted locking and liftingboltfor engaging said socket provided with an upper forwardly extendingterminal hook, means on the door providing limited guiding movement forthe locking bolt,

and a freely suspended swinging loop adapted to engage the terminal hookof the bolt provided with endmost fiexible supports for holding the loopin hook-engaging position. Y

2. A forwardly and downwardly movable dumping car having abolt socket atits front lower floor portion, an outwardly and upwardly swinging endgate pivotally connected with the sides of the car, vertically arrangedof'fset' spaced-apart bearings on the end gate, a correspondingly offsetlocking bolt mounted for limited movement in said bearings and having alower socket engaging terminal and an upper forwardlyV extending hook,and a triangular-shaped hook-arresting frame provided with a middle andopposite lateral flexiblev supporting devices for holding the loop inhook-engaging position.

3. A forwardly and downwardly movable dumping Car having a bolt socketat its front lower floor portion, an outwardly and upwardly swinging endgate pivotally connected with the sides of the car, vertically arrangedofset spaced-apart bearings on the end gate, a correspondingly offsetlocking bolt mounted for limited movement in said bearings and havingalower socket engaging ter minal and an upper forwardly extending hook,a freely suspended swinging` loop adapted to engage the hook to firstwithdraw the bolt from the socket and to then arrest downward movementof the end gate, and a central and endmost supporting chains for holdingthe loop in hook-engaging position.

In testimony whereof I hereunto affix my signature.

JOHN A. HEBB.

